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A motorcycle and a police car are moving toward one another. Thepolice car emits sound with a frequency of 522 Hz and has a speedof 27.0 m/s. The motorcycle has a speed of 12.0 m/s.
What frequency (in Hz) does the motorcyclist hear?
An automobile accelerates from rest at 20 m/s2 for 20 s. The speed is held constant for 20 s, after which there is acceleration of ( -3 m/s2 ) until the automobile stops. What is the total distance traveled?
A charge of +45.9 C is at the origin. When charge Q is placed at 2 m along the positive x axis, What is the value of Q
A high-energy pulsed laser emits a 1.2-ns-longpulse of average power 1.3×1011W. Determine the rms value of the electric field
A solid weighs 300N. Calculate the pressure exerted by the solid when it is kept on a glass surface, if the area of contact is 700cm2 . solve the numerical.
A proton is on the x axisat x = 1.2 nm. An electron is onthe y axisat y = 0.66 nm. Find the net force the two exert on ahelium nucleus (charge +2e) at the origin. i need theforces in vector i and j form. Try following the solution but myanswer is com..
A rectangular fish tank measures 30 cm by 75 cm by 40 cm high. The tank is filled with water to a depth of 37 cm. What is the total force of the water on the bottom
1. a compact disk spins with angular velocity 43.5rads . the player is turned off and 2.95s later the cd has
visible light of wavelength 480 nm is incident on a diffraction grating with a slit spacing of 0.003 nm. how many
A highway is to be built between two towns, one of which lies 35.0 km south and 44.0 km west of the other. at what angle would this highway be directed
In astronomy it is common to expose a photographic plate to a particular portion of the night sky for quite some time in order to gather plenty of light. For how long should Matt expose a second plate located 4.1 m from the source
An impulse of150 Ns is required to stop a person's head in a carcollision. If the face is in contact with the steering wheelfor 0:0304 s, what is the force on the cheekbone
A uniform plate of height 1.920 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y = 1.000 x2. The plate has a mass of 1.17 kg.
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